user manual

The DC controller determines a memory tag error and notifies the formatter when it fails to either read
from or write to the memory tag.
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Cartridge presence detection: The DC controller detects the presence of the cartridges by
monitoring the memory tag. The DC controller notifies the formatter when a cartridge is missing or
installed in the incorrect slot.
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Toner level detection: The DC controller detects the remaining toner in a cartridge by the optical
detection method and then notifies the formatter of the remaining toner level.
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Cartridge life detection: The DC controller detects the cartridge life by monitoring the total operating
time or remaining toner level of the print cartridge. The DC controller determines a cartridge end
of life and notifies the formatter when total operating time of the cartridge reaches a specified time
or the cartridge runs out of toner.
Developing-roller engagement and disengagement
The product can print in full-color mode or in black-only mode. To print in black-only mode, the product
disengages the developing rollers in the cyan, magenta, and yellow print cartridges which maximizes
the life of the cartridges.
Figure 1-24 Developing-roller engagement and disengagement control
Developing unit is disengaged
Developing
disengagement
motor
Photosensitive drum
Developing unit
Developing disengagement cam
SR11
Developing disengagement sensor
DC controller
M10
Developing unit is engaged
30 Chapter 1 Theory of operation ENWW